Allen-Bradley PLC-5 User Manual page 90

6-18 Communicating with Remote I/O
B
Did the block-transfer
complete without errors?
Sets the done .DN bit (13).
Was the block-transfer
a BTR?
Copies data from the active
buffer to the block-transfer file
in the data table.
Publication 1785-UM012D-EN-P - July 2005
no
Sets the error .ER bit (12).
yes
no
yes
Is the block-transfer
continuous? (the .CO bit is set.)
no
Frees up the active buffer
for the next request
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Start
6-17
yes
Re-initializes the block-transfer.
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A
6-17